⚠️ Furnace Failing? (416) 424-4328 — Free Repair vs Replace Assessment Scarborough
Signs Your Furnace Needs Replacing in Ontario — Repair vs Replace Guide for Scarborough Homeowners
Signs Your Furnace Needs Replacement (Not Repair)
- Age 20+ years — Most furnaces last 15–25 years. Any major repair on a 20-year system is rarely cost-effective.
- Cracked heat exchanger — Carbon monoxide hazard. Replace immediately. This alone requires furnace replacement.
- Repair cost over 40% of replacement cost — $2,200 repair on a $5,000 furnace replacement: replace.
- 3+ repairs in last 2 years — End-of-life failure pattern.
- Efficiency below 80% AFUE — Old 60% AFUE furnace vs new 96%: $400–$600/year in gas savings.
Ontario Furnace Replacement Costs (2026)
- 96% AFUE High-Efficiency Gas Furnace: $3,500–$5,500 installed
- Brands available: Lennox, Carrier, York, Daikin
How do I know when to replace my furnace in Ontario?
Replace your furnace in Ontario when: it is 20+ years old, has a cracked heat exchanger, repair cost exceeds 40% of replacement cost, or has had 3+ repairs in the last 2 years. New 96% AFUE furnaces cost $3,500-$5,500 installed. Call Madina Mechanical at (416) 424-4328 for a free assessment in Scarborough.
🔗 Furnace Installation Scarborough | Furnace Repair Scarborough
Free Furnace Assessment: (416) 424-4328

